<template>
  <td
    class="table-cell"
    :class="[selected ? 'selected' : '', customClass]"
    :style="{ width: widget.options.cellWidth + '!important' || '', height: widget.options.cellHeight + '!important' || '', 'word-break': !!widget.options.wordBreak ? 'break-all' : 'normal' }"
    :colspan="widget.options.colspan || 1"
    :rowspan="widget.options.rowspan || 1"
    @click.stop="selectWidget(widget)"
  >
    <draggable
      :list="widget.widgetList"
      item-key="id"
      v-bind="{ group: 'dragGroup', ghostClass: 'ghost', animation: 200 }"
      tag="transition-group"
      :component-data="{ name: 'fade' }"
      handle=".drag-handler"
      @end="(evt) => onTableDragEnd(evt, widget.widgetList)"
      @add="(evt) => onTableDragAdd(evt, widget.widgetList)"
      @update="onTableDragUpdate"
      :move="checkContainerMove"
    >
      <template #item="{ element: subWidget, index: swIdx }">
        <div class="form-widget-list">
          <template v-if="'container' === subWidget.category">
            <component :is="subWidget.type + '-widget'" :widget="subWidget" :designer="designer" :key="subWidget.id" :parent-list="widget.widgetList" :index-of-parent-list="swIdx" :parent-widget="widget"></component>
          </template>
          <template v-else>
            <component :is="subWidget.type + '-widget'" :field="subWidget" :designer="designer" :key="subWidget.id" :parent-list="widget.widgetList" :index-of-parent-list="swIdx" :parent-widget="widget" :design-state="true"></component>
          </template>
        </div>
      </template>
    </draggable>

    <div class="table-cell-action" v-if="designer.selectedId === widget.id && widget.type === 'table-cell'">
      <i :title="i18nt('designer.hint.selectParentWidget')" @click.stop="selectParentWidget()"><svg-icon icon-class="el-back" /></i>
      <el-dropdown trigger="click" @command="handleTableCellCommand" size="small">
        <i :title="i18nt('designer.hint.cellSetting')"><svg-icon icon-class="el-menu" /></i>
        <template #dropdown>
          <el-dropdown-menu>
            <el-dropdown-item command="insertLeftCol">{{ i18nt("designer.setting.insertColumnToLeft") }}</el-dropdown-item>
            <el-dropdown-item command="insertRightCol">{{ i18nt("designer.setting.insertColumnToRight") }}</el-dropdown-item>
            <el-dropdown-item command="insertAboveRow">{{ i18nt("designer.setting.insertRowAbove") }}</el-dropdown-item>
            <el-dropdown-item command="insertBelowRow">{{ i18nt("designer.setting.insertRowBelow") }}</el-dropdown-item>
            <el-dropdown-item command="mergeLeftCol" :disabled="mergeLeftColDisabled" divided>{{ i18nt("designer.setting.mergeLeftColumn") }}</el-dropdown-item>
            <el-dropdown-item command="mergeRightCol" :disabled="mergeRightColDisabled">{{ i18nt("designer.setting.mergeRightColumn") }}</el-dropdown-item>
            <el-dropdown-item command="mergeWholeRow" :disabled="mergeWholeRowDisabled">{{ i18nt("designer.setting.mergeEntireRow") }}</el-dropdown-item>
            <el-dropdown-item command="mergeAboveRow" :disabled="mergeAboveRowDisabled" divided>{{ i18nt("designer.setting.mergeRowAbove") }}</el-dropdown-item>
            <el-dropdown-item command="mergeBelowRow" :disabled="mergeBelowRowDisabled">{{ i18nt("designer.setting.mergeRowBelow") }}</el-dropdown-item>
            <el-dropdown-item command="mergeWholeCol" :disabled="mergeWholeColDisabled">{{ i18nt("designer.setting.mergeEntireColumn") }}</el-dropdown-item>
            <el-dropdown-item command="undoMergeRow" :disabled="undoMergeRowDisabled" divided>{{ i18nt("designer.setting.undoMergeRow") }}</el-dropdown-item>
            <el-dropdown-item command="undoMergeCol" :disabled="undoMergeColDisabled">{{ i18nt("designer.setting.undoMergeCol") }}</el-dropdown-item>
            <el-dropdown-item command="deleteWholeCol" :disabled="deleteWholeColDisabled" divided>{{ i18nt("designer.setting.deleteEntireCol") }}</el-dropdown-item>
            <el-dropdown-item command="deleteWholeRow" :disabled="deleteWholeRowDisabled">{{ i18nt("designer.setting.deleteEntireRow") }}</el-dropdown-item>
          </el-dropdown-menu>
        </template>
      </el-dropdown>
    </div>

    <div class="table-cell-handler" v-if="designer.selectedId === widget.id && widget.type === 'table-cell'">
      <i>{{ i18nt("designer.widgetLabel." + widget.type) }}</i>
    </div>
  </td>
</template>

<script>
import i18n from "@/components/FormDesigner/utils/i18n";
import FieldComponents from "@/components/FormDesigner/form-widget/field-widget/index";
import refMixinDesign from "@/components/FormDesigner/refMixinDesign";
import SvgIcon from "@/components/FormDesigner/svg-icon";

export default {
  name: "TableCellWidget",
  componentName: "TableCellWidget",
  mixins: [i18n, refMixinDesign],
  inject: ["refList"],
  components: {
    ...FieldComponents,
    SvgIcon
  },
  props: {
    widget: Object,
    parentWidget: Object,
    parentList: Array,

    rowIndex: Number,
    colIndex: Number,
    rowLength: Number,
    colLength: Number,
    colArray: Array,
    rowArray: Array,

    designer: Object
  },
  computed: {
    selected() {
      return this.widget.id === this.designer.selectedId;
    },

    customClass() {
      return this.widget.options.customClass || "";
    },

    mergeLeftColDisabled() {
      return this.colIndex <= 0 || this.colArray[this.colIndex - 1].options.rowspan !== this.widget.options.rowspan;
    },

    mergeRightColDisabled() {
      let rightColIndex = this.colIndex + this.widget.options.colspan;
      return this.colIndex >= this.colLength - 1 || rightColIndex > this.colLength - 1 || this.colArray[rightColIndex].options.rowspan !== this.widget.options.rowspan;
    },

    mergeWholeRowDisabled() {
      return this.colLength <= 1 || this.colLength === this.widget.options.colspan;
    },

    mergeAboveRowDisabled() {
      return this.rowIndex <= 0 || this.rowArray[this.rowIndex - 1].cols[this.colIndex].options.colspan !== this.widget.options.colspan;

      //return this.rowIndex <= 0
      //return (this.rowIndex <= 0) || (this.widget.options.colspan !== this.rowArray) //TODO
    },

    mergeBelowRowDisabled() {
      let belowRowIndex = this.rowIndex + this.widget.options.rowspan;
      return this.rowIndex >= this.rowLength - 1 || belowRowIndex > this.rowLength - 1 || this.rowArray[belowRowIndex].cols[this.colIndex].options.colspan !== this.widget.options.colspan;
    },

    mergeWholeColDisabled() {
      return this.rowLength <= 1 || this.rowLength === this.widget.options.rowspan;
    },

    undoMergeColDisabled() {
      return this.widget.merged || this.widget.options.colspan <= 1;
    },

    undoMergeRowDisabled() {
      return this.widget.merged || this.widget.options.rowspan <= 1;
    },

    deleteWholeColDisabled() {
      //return this.colLength === 1
      return this.colLength === 1 || this.widget.options.colspan === this.colLength;
    },

    deleteWholeRowDisabled() {
      return this.rowLength === 1 || this.widget.options.rowspan === this.rowLength;
    }
  },
  watch: {
    //
  },
  created() {
    this.initRefList();
  },
  methods: {
    selectWidget(widget) {
      this.designer.setSelected(widget);
    },

    checkContainerMove(evt) {
      return this.designer.checkWidgetMove(evt);
    },

    onTableDragEnd(obj, subList) {
      //
    },

    onTableDragAdd(evt, subList) {
      //重复代码，可合并
      const newIndex = evt.newIndex;
      if (subList[newIndex]) {
        this.designer.setSelected(subList[newIndex]);
      }

      this.designer.emitHistoryChange();
    },

    onTableDragUpdate() {
      this.designer.emitHistoryChange();
    },

    selectParentWidget() {
      if (this.parentWidget) {
        this.designer.setSelected(this.parentWidget);
      } else {
        this.designer.clearSelected();
      }
    },

    handleTableCellCommand(command) {
      if (command === "insertLeftCol") {
        this.insertLeftCol();
      } else if (command === "insertRightCol") {
        this.insertRightCol();
      } else if (command === "insertAboveRow") {
        this.insertAboveRow();
      } else if (command === "insertBelowRow") {
        this.insertBelowRow();
      } else if (command === "mergeLeftCol") {
        this.mergeLeftCol();
      } else if (command === "mergeRightCol") {
        this.mergeRightCol();
      } else if (command === "mergeWholeCol") {
        this.mergeWholeCol();
      } else if (command === "mergeAboveRow") {
        this.mergeAboveRow();
      } else if (command === "mergeBelowRow") {
        this.mergeBelowRow();
      } else if (command === "mergeWholeRow") {
        this.mergeWholeRow();
      } else if (command === "undoMergeCol") {
        this.undoMergeCol();
      } else if (command === "undoMergeRow") {
        this.undoMergeRow();
      } else if (command === "deleteWholeCol") {
        this.deleteWholeCol();
      } else if (command === "deleteWholeRow") {
        this.deleteWholeRow();
      }
    },

    insertLeftCol() {
      this.designer.insertTableCol(this.parentWidget, this.colIndex, this.rowIndex, true);
    },

    insertRightCol() {
      this.designer.insertTableCol(this.parentWidget, this.colIndex, this.rowIndex, false);
    },

    insertAboveRow() {
      this.designer.insertTableRow(this.parentWidget, this.rowIndex, this.rowIndex, this.colIndex, true);
    },

    insertBelowRow() {
      this.designer.insertTableRow(this.parentWidget, this.rowIndex, this.rowIndex, this.colIndex, false);
    },

    mergeLeftCol() {
      this.designer.mergeTableCol(this.rowArray, this.colArray, this.rowIndex, this.colIndex, true, this.widget);
    },

    mergeRightCol() {
      this.designer.mergeTableCol(this.rowArray, this.colArray, this.rowIndex, this.colIndex, false, this.widget);
    },

    mergeWholeRow() {
      this.designer.mergeTableWholeRow(this.rowArray, this.colArray, this.rowIndex, this.colIndex);
    },

    mergeAboveRow() {
      this.designer.mergeTableRow(this.rowArray, this.rowIndex, this.colIndex, true, this.widget);
    },

    mergeBelowRow() {
      this.designer.mergeTableRow(this.rowArray, this.rowIndex, this.colIndex, false, this.widget);
    },

    mergeWholeCol() {
      this.designer.mergeTableWholeCol(this.rowArray, this.colArray, this.rowIndex, this.colIndex);
    },

    undoMergeCol() {
      this.designer.undoMergeTableCol(this.rowArray, this.rowIndex, this.colIndex, this.widget.options.colspan, this.widget.options.rowspan);
    },

    undoMergeRow() {
      this.designer.undoMergeTableRow(this.rowArray, this.rowIndex, this.colIndex, this.widget.options.colspan, this.widget.options.rowspan);
    },

    deleteWholeCol() {
      this.designer.deleteTableWholeCol(this.rowArray, this.colIndex);
    },

    deleteWholeRow() {
      this.designer.deleteTableWholeRow(this.rowArray, this.rowIndex);
    }
  }
};
</script>

<style lang="scss" scoped>
.table-cell {
  //padding: 3px;
  border: 1px dashed #336699;
  display: table-cell;
  position: relative;

  .draggable-div {
    position: relative;
    height: 100%;
  }

  .form-widget-list {
    border: 1px dashed #336699;
    margin: 3px;
    min-height: 28px;
    //height: 100%;
  }

  .table-cell-action {
    position: absolute;
    //bottom: -30px;
    bottom: 0;
    right: -2px;
    height: 28px;
    line-height: 28px;
    background: $--color-primary;
    z-index: 999;

    display: flex;
    align-items: center;

    i {
      font-size: 14px;
      color: #fff;
      margin: 0 5px;
      cursor: pointer;
    }
  }

  .table-cell-handler {
    position: absolute;
    top: -2px;
    //bottom: -24px;  /* 拖拽手柄位于组件下方，有时无法正常拖动，原因未明？？ */
    left: -2px;
    height: 22px;
    line-height: 22px;
    background: $--color-primary;
    z-index: 9;

    i {
      font-size: 14px;
      font-style: normal;
      color: #fff;
      margin: 4px;
      cursor: default; //cursor: move;
    }
  }
}

.table-cell-action,
.table-cell-handler {
  :deep(.svg-icon) {
    margin-left: 0.1em;
    margin-right: 0.1em;
  }
}

.table-cell.selected {
  outline: 2px solid $--color-primary !important;
}
</style>
